Clutch mechanism



UNITED STATES PATENT OFFICE.

D. BERT HARTLEY, OF CHICAGO, ILLINOIS.

`CLUTCH MECHANISM.

SPECIFICATION forming part of Letters Patent No. 276,688, dated May 1, 1883.

Application filed October 28, 1882. (No model.)

To all whom it may concern: 4

Be it known that I, D. BERT HARTLEY, of Chicago, county of Cook, and State of Illinois, have inverted certain new and useful Improvements in a Clutch Mechanism, of which the following is a full, clear, and exact description, that will enable others to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, formin ga part of this specification.

This invention relates to improvements in a clutch or clamping mechanism which may be used for various purposes, but is more especially designed foruse in connection with the pivoted arms and adjustable head-rests of reclining-chairs.

Figure l is a view in perspective of' aclutch device embodying my improved features. Figs. 2 and 3 show the Atwo principal parts delached from each other. Fig. 4 is a view of the spring used between the two parts shown in Figs. 2 4and 3; Fig. 5, a longitudinal section, showing the manner of attaching the device. Fig. 6 is a detached detail.

Referring to the drawings, A represents a clutch-disk provided with a toothed or serrated inner edge, the teeth projecting in the line of its axis. `The inner face of the disk A is provided with the annular rim t and the tubular stem a', adapting these parts to engage with the companion part B. The lateral projecting perforated lug a2 is for the purpose ot' attaching this part to the object. The perforation a receives one end of the spring A', forthe purpose of imparting the necessary tension to the same, and holding it to its proper place when the 'teeth` are not engaged. The perforation t4 in the end of the prolongation c is for the purpose ot' receiving the stop-pin or setsscrew b. This end of the stein a is also screw-threaded for the reception of the correspondingly-threaded hand-n ut b', which serves to regulate the distance between the faces of the disks A and B, or to hold them rigidly together. The companion part or ratchet-disk B is provided with teeth `on the inner face, which correspond with similar teeth in the disk A, and adapt these parts to engage with each other. The recess b2 receives the rim a and the projecting sleeve D, forming an integral part of the disk B, and provides a chamber for the reception of the spiral spring A. The opposite ends ot' the spring are inserted through the perforations in the endl ot' the sleeve D and the perforation a3, as shown in Figs. 2 and 3 of the drawings. The stem a passes through on the inside ofthe spring, the extreme end having a hearin g in the reduced opening in the end ot' the sleeve D, as shown in Fig. 1 of the drawings. This arrangement provides the disk A with two bearings in theJ companion part B, the annular rim a Jforming the second bearing in the recessed end ofthe disk B. The disk B is provided with the perforated lugs d d, which serve for attaching purposes. l

Fig. 5 illustrates the arrangement and position of the device when in use.

The clamping part consists of the bolt E, which passes longitudinally through the tubular stem a. This bolt is provided on one end with the enlarged at head d', While the opposite end is threaded for the reception of the clamping-nut F. When the clamping-nut F is slacked back the spiral spring A serves to throw the toothed disks out of engagement relative to each other, readily allowing the parts to be rotated and again clamped together at any desired angle. A very slight movement ofthe clamping-nut will suttice.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The ratchet-disk A, having teeth on the inner face which project in thc lille of its axis, and provided with the annular riin a, and the tubular projecting stern a', substantially as and for the purpose described.

2. The companion disk B, having a correspondingly-serrated face and the recess b2, and provided with the projecting sleevcD and the attaching-lugs el d, substantially as 'and for thepurpose described.

3. The combination, with the ratchet-disk A,.provided with the annular rim a and the tubular projection a, of the companion disk B, provided-with the recess b2 and the sleeve D, whereby the part A is adapted to have and the companion part'. B, the clamping-bolt a. bearing at each end, substantially as de- E, and the clamping-nut F, substantially as scribed. described.

4. The combination, with the ratchet-disk D. BERT HARTLEY. 5 A and the companion part. B, of the spiral spring' A', substantially as described.

5. The combination of the ratchet-disk A Witnesses L. M. FREEMAN, L. B. COUPLAND. 

